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- EMDB-51975: Pooled 50S subunit C_(L22)-~H61 precursor states supplemented wit... -
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Open data
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Basic information
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Title | Pooled 50S subunit C_(L22)-~H61 precursor states supplemented with Api137 | |||||||||||||||
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![]() | ribosome / antimicrobial peptide / RNA / ribosomal protein / PrAMP / proline-rich peptide / antibiotics / 50S / Api137 | |||||||||||||||
Function / homology | ![]() transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / negative regulation of cytoplasmic translation / translation repressor activity / mRNA regulatory element binding translation repressor activity / ribosome assembly / DNA-templated transcription termination / mRNA 5'-UTR binding / large ribosomal subunit ...transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / negative regulation of cytoplasmic translation / translation repressor activity / mRNA regulatory element binding translation repressor activity / ribosome assembly / DNA-templated transcription termination / mRNA 5'-UTR binding / large ribosomal subunit / ribosomal large subunit assembly / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / negative regulation of translation / rRNA binding / defense response to bacterium / ribosome / structural constituent of ribosome / translation / innate immune response / response to antibiotic / negative regulation of DNA-templated transcription / mRNA binding / DNA binding / extracellular region / zinc ion binding / cytosol / cytoplasm Similarity search - Function | |||||||||||||||
Biological species | ![]() ![]() ![]() ![]() | |||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.62 Å | |||||||||||||||
![]() | Lauer S / Nikolay R / Spahn CMT | |||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: The proline-rich antimicrobial peptide Api137 disrupts large ribosomal subunit assembly and induces misfolding. Authors: Simon Malte Lauer / Jakob Gasse / Andor Krizsan / Maren Reepmeyer / Thiemo Sprink / Rainer Nikolay / Christian M T Spahn / Ralf Hoffmann / ![]() Abstract: The proline-rich antimicrobial designer peptide Api137 inhibits protein expression in bacteria by binding simultaneously to the ribosomal polypeptide exit tunnel and the release factor (RF), ...The proline-rich antimicrobial designer peptide Api137 inhibits protein expression in bacteria by binding simultaneously to the ribosomal polypeptide exit tunnel and the release factor (RF), depleting the cellular RF pool and leading to ribosomal arrest at stop codons. This study investigates the additional effect of Api137 on the assembly of ribosomes using an Escherichia coli reporter strain expressing one ribosomal protein per 30S and 50S subunit tagged with mCherry and EGFP, respectively. Separation of cellular extracts derived from cells exposed to Api137 in a sucrose gradient reveals elevated levels of partially assembled and not fully matured precursors of the 50S subunit (pre-50S). High-resolution structures obtained by cryogenic electron microscopy demonstrate that a large proportion of pre-50S states are missing up to five proteins (uL22, bL32, uL29, bL23, and uL16) and have misfolded helices in 23S rRNA domain IV. These data suggest a second mechanism for Api137, wherein it disrupts 50S subunit assembly by inducing the formation of misfolded precursor particles potentially incapable of evolving into active ribosomes, suggesting a bactericidal mechanism. | |||||||||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 51.9 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 30.6 KB 30.6 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 9.9 KB | Display | ![]() |
Images | ![]() | 116.1 KB | ||
Masks | ![]() | 103 MB | ![]() | |
Filedesc metadata | ![]() | 8.4 KB | ||
Others | ![]() ![]() | 95.5 MB 95.5 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 1.1 MB | Display | ![]() |
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Full document | ![]() | 1.1 MB | Display | |
Data in XML | ![]() | 17.8 KB | Display | |
Data in CIF | ![]() | 22.9 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 9ha3MC ![]() 9h3kC ![]() 9h3lC ![]() 9h3mC ![]() 9h3nC ![]() 9h3oC ![]() 9h3pC ![]() 9h3qC ![]() 9h3rC ![]() 9h3sC ![]() 9h3tC ![]() 9h3uC ![]() 9h3vC ![]() 9h3wC ![]() 9h3xC ![]() 9h3yC ![]() 9h3zC ![]() 9ha1C ![]() 9ha2C ![]() 9ha4C ![]() 9ha5C ![]() 9ha6C ![]() 9ha7C ![]() 9haiC ![]() 9halC ![]() 9hamC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.332 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
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Density Histograms |
-Half map: #2
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Density Histograms |
-Half map: #1
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Density Histograms |
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Sample components
+Entire : pre50S precursor derived from Api137-treated cells supplemented w...
+Supramolecule #1: pre50S precursor derived from Api137-treated cells supplemented w...
+Macromolecule #1: Large ribosomal subunit protein bL34
+Macromolecule #2: Large ribosomal subunit protein uL13
+Macromolecule #3: Large ribosomal subunit protein bL20
+Macromolecule #4: Large ribosomal subunit protein bL21
+Macromolecule #5: Large ribosomal subunit protein uL23
+Macromolecule #6: Large ribosomal subunit protein uL24
+Macromolecule #7: Large ribosomal subunit protein uL29
+Macromolecule #8: Large ribosomal subunit protein uL30
+Macromolecule #10: 50S ribosomal protein L3
+Macromolecule #11: Large ribosomal subunit protein uL4
+Macromolecule #12: Large ribosomal subunit protein uL15
+Macromolecule #13: Large ribosomal subunit protein bL17
+Macromolecule #14: Apidaecins type 22
+Macromolecule #9: 23S ribosomal RNA
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.6 |
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Grid | Model: Quantifoil R2/2 / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | TFS KRIOS |
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Specialist optics | Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV |
Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Number real images: 2794 / Average exposure time: 1.2 sec. / Average electron dose: 46.2 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 100.0 µm / Illumination mode: OTHER / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.8 µm |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |